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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95f60e8c115639759b425821e5a8e3d3b7404d9b72ad09d483afcaf36489d61a' 
  AND token = 'CFUxbtB0Uvf8amkzAcdV724gJUVNyAVtLEuptxQ1OPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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