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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dc1383daac75eeebff90a154d5be79eda0da4414aa80eb7d8728e3fc47a888ee' 
  AND token = 'DdX25Lcmzrye1HosGrQLLD8jdfsz/5WwOU75N0Gvnes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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