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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '97cb0c22bf9fd6a3d58bb2adb02e032c81e8a3de38e77cf4727b761898484b0a' 
  AND token = 'EyziT8S25voPLQVaNAC3LadVBwxP7JOdiVyxG73BV/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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