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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '652c28faec9bba48f40e06ec161ec0d89d7750e9ec2d04cf8ad6de2f5b1b547b' 
  AND token = '1anxzFKTcg0SZzA0Q6ymDXxr72B99bPJTfFulgaqSMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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