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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee4cecc3759add07d969393108cbad4880fc66941d595c66ca1138fe39234d15' 
  AND token = 'Y93Id1aOZONFv5E+819aSRry8VyFlD+D6snvIrYjFdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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