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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '92ddc5b75104f5bdaaf6866bf5ce127e6ea63358c3ea0e1c4c38d87cbf9f8bec' 
  AND token = '8ERGJkllOUx8J8obU4ODnDdlQ6KvQPa+v8AcwDLHBcI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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