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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5070c2e1df3f6f1625b9a114159bba79120a951ee168fb56d54170413ad5459' 
  AND token = 'LJW3nArMh4YzTDTIXTVDvzJkQa4x7/Ek/5df0nMpIzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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