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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '176d49e722b7862e6bf2141b13f47cfa12bf515c32d4016261e5b92959c68d16' 
  AND token = 'Q/1O8Nf1Vpdd7O1kO7KOTDP/WGmV1XFlGhpji1vI/bU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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