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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ae7ceb04a9397dba9d301bf2df00a86a1aae81fd8b3939d74dd67ca8909e02d1' 
  AND token = 'Y/wuk4utVdoJfxl2kR78/5YWL6m87KoH5a1uS/L06BE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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