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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e8bdd438f550fa90989041ba62cae7f95083edcc2e2014fee5169ae65376501d' 
  AND token = '/XeeI4WUEtuYaLYsx0tv9eQlz9XqcOvipA6jA0hZ2tU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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