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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32db02884320de87fc39ec5501020fd12a0821101ab6dc4cd908d68851714222' 
  AND token = 'nG2bHceKvwI5k/Q8D0cY95MbSuLCRMtXCP8q6JyZSOs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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