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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0807566e2438674aabe6cc03b2a251a8c88f0a5ee91fecceafcbf75515c1ea1e' 
  AND token = 'jww9yMTcPdJzoDOMwBBtzLZlvSVooHrajqQWhBtGaeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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