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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbf0b879278eeb73357ba4a9b1030070aa142d0dcd76cf2879b968699854e147' 
  AND token = 'mZ4bqQiTyp0RNP31N/54WPAD/cGXLNMejkITJIj3YiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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