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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7432b5d2bf13955c26e7f22b8e31db701a55a51f31909752d149d7c64779e0ae' 
  AND token = 'ZQd135PXueH7SnJ5JVUo6yP6vN59k3XO4RXH4V7kOtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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