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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dfb5615ef7899ff0c6fcbeb8eb9e16bd8ea2bfa74e7bd7907ca07c09cfd9e54b' 
  AND token = 'CFAJsijFmtEhvTMbuTF+Ipr3zJYgeNp4pEsKg8A39lE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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