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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '996c810706207514e9b5b96c84e73a46af17f4a2260ab1ed05366b3a3dc0ce59' 
  AND token = 'QxZabk4Vn8wdNUlaQkNVdSyiLDXqvIp1wVuBqC6K5hE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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