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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1babd0a6c01ea6b36c52e5c74f864f7f8355262c50b7b71cb33a6ad6e1bd90c' 
  AND token = 'FDR2z5ir1KJMRpnzDFLnH2cNjBVdT3fbaa1ILoLQvvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}