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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '715cd73c0cbb10ea60cbab62b795e39b01ab5d330578c1e04e182a7047e56455' 
  AND token = '7GdXfyBGinvb5aQ81V+rC3fYZmV3ML3mN8UxboBw9rE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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