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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '64e85580c4fad62478722d592714e66c9d1276820e5d27296e77917cd6921725' 
  AND token = 'mVBTskSOkZDl4hti+UrhfZozSqnutGSD/S2gFpSz744=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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