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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '126833f77adcad8e61bab36c1a74261f4bac259a34afa6778fddbf4c1ca973ee' 
  AND token = 'biAqbcmq1K5d/5y3XoUvQX1b4XdJdial9nRs0sl/Yhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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