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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2df72662bbb7c7cfd49fcaebd11cccf5099cb1393d66972efe073bde9904440e' 
  AND token = '5bWss26oKjci28Rw9BVoe1NFLmvQ/7/FazNLpU60Dl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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