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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78bd7b05d5dc241f630020b89fa28e04f8e0bb880f4d3e1ec37ea57ff33dcf84' 
  AND token = 'gw5dKVeF0o2WCEwvHWJzF55Z8g5a2uLuwP2VdiEYc2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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