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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '025ccb69e62495a396c8a2e834e75c19139a0930dd324305872bc3c855cfabd4' 
  AND token = 'XI7QWGH2+Trc7paR1YqOmUAlPtKR4K7/SXDe23GkpTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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