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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '069c024de512a0ec2532705c8076074b707f2c4b9606d1c77eff2f2b457942bf' 
  AND token = 'qEE7kbFwoeYQAJdZojGJjHFdtYvBaPkRWtXKdNfYXhw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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