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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9adb2b70e265a582e5bff000211eadb7116c018ce85b7256b77657a5dd9ad83e' 
  AND token = 'Gp1q+JtOR97rZNihOaScKBx0P+Uo2D3aZnE0bwaFVPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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