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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '30a9aa7a47c83d43c3683aede582b80d59f12679dacaa0df2fb68a2d28b607bc' 
  AND token = '1Dhigyxm57bzgRHNTGWI+RXGudtQy4SR6Ehck4PAtkI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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