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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b044ae291bcf464669b1bd8f2e90b507c46ac4f41e7f91e8b736aa0e9a44d1c2' 
  AND token = '1bc7JwEUkE32U5ndAcLpWU3QIxv1vzKK6qsBNRCg1Ks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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