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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4560dc14bca6d26a5a4839d477155891e06d57f9e01742ce929965fa4e736ff0' 
  AND token = 'vvKdZaHE1pnhIp9K0sRWQbLT3/scWQoy/cq75R/lw4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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