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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecd50b9e6ad69439b1e10ad3139ba8ceb603822cff5fb54797ec8b10bee75309' 
  AND token = 'UOLm1EaJo9J1NU1tFEQrGVxKeoZNO7aIoQfRE+X56S8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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