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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3ab7007bcef64b5f45ca7076c434f919b444bf9f0c7c0d026d52f048bc322a35' 
  AND token = 'gVAXH8SelBdOLklbMDKxLsgGYYCifhSA6ShI1NUfNLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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