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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65ae31e83d85cb022d784710b720768c6198fe25c4f27c05be45c291b1ed11fb' 
  AND token = 'Lva5r8KCog9Pg6RjMdslD3u4sKENACQ1ZAIpY3HtpgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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