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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7027ff08e43661b39d0983ad988de6f9b690c08e944729b70adf94faf698b630' 
  AND token = 'Q04qz2b+Q7TpuLHSHw8r5ERSqZOpd5qQ57LWm05fTTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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