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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '743b08201b53e7d960155bab3ce0900b9f3f90bfdcb74694e98e1af1cb8e8bda' 
  AND token = 'aedsz3UDXR6gWKphyy6EPbD5mex+MpIz9N5qMSK7VJ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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