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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dca2acba5bf5415032857d86a5645adfc6d084dabae30ab23fe0d70741d10b5e' 
  AND token = 'nO22G4DY7exkn4yqzF+HbwGANGwmLrCxksZZUC3Q5FM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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