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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '46b81ebf875dcd2a6bb1515f36047b5baafa75405c1615a4885a930e5fd8481d' 
  AND token = 'Qyq/ZNa7UXHRZAX0ODVv+AFZzb0069OMQ+c+pLUK5Eo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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