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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '092df4165709658622bb5c9cdd82ec66b029ac8bf71e2b21820744a33c7e91fb' 
  AND token = '/dD4Mi9uComPT2cSeN0vWJoqp3TILXwuS0G76c0Ptso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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