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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e081c390887ec05820a64d1a3db2f148ed4068fcfa4f11a2abe5ad225d52779f' 
  AND token = 'NFEspjL5XATUpENBx0nG+cklavi6wbpLbgLEmQMlEMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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