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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e63a897663de6b0d61936aee26939d7f226dab66e93a0717056ceb27f30a29c' 
  AND token = 'ANlPHO40U8r/qDJ6t26g74UIhEMK3c/eBld1ME1zI3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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