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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8130c6f827a8491b0a483833197ff4b31403007c2a680356f26ebd896ea2609' 
  AND token = '64O1YCYRQJA4gqRHz6RDHIuYWHbFYqqV3runPZASAl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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