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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '85dd5272e767aded3ca1df95d13403e0334178f00d6e45a2e8840e562ddb4ca0' 
  AND token = '/NhsHPOUctedPyk29tnThiMifFoEl00UxyQafy0QZHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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