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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4a45132b1caf06e932dc81379c90927d539c50ebbf98e4b3f131a9319e16eb89' 
  AND token = 'DF8x13E6ZQBe0ehuTnD2krV7Iw8zCW2vc4HbYak7ZR4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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