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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dfd6f5218a268482ebdddebc33b766f3a310a473969a16c5f4370de3a05c1994' 
  AND token = 'dSKZXD/88GSpUSyvhcPnY9u4DCuE8XRNloo1mnpG0SE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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