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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24392aa056b9d8e6be39942e53bb44c7699795aec7560c27bb7263318e85814e' 
  AND token = 'Tsd7tRtl6TByElsRJmMWIDHhGEUGtCJG58Zjs9RV2YE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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