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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa2e2080cc8392e7ffba06b2b723d1ecc2444c8ec10552d3351a1c555aa45220' 
  AND token = '4/ZfWbBZoOnXVmgXRZ/9aXHIlEHyWF/AZa1x5YTJruA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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