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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02022bb3594e9c00fec0514ab092e77fb1a399f16c8501f22b0ddfd5b38fd558' 
  AND token = 'EUzIu+ctk0YHW0vFMsyquGQgckg0oocgHtRAbZIafKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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