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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89875f7fa14240fbfe2fad2abc9c0b8518a9b9855bbbc0124977f3224ed5ac49' 
  AND token = 'I6N74C3MnM0w2nGWjpD/wblJtiUSEC44yoQXS2P6to8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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