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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ee4fcce91f2fcc250e2fd29ac9aeacc1cb9dd4ecdb4e793112c1c43fc5964d4' 
  AND token = 'cokVF88zxoPYxtDQp5t1WWazk40jyi+0KTfzw07jI88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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