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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ae5fbc8bb348e0e668cfa46bfc693566e18bae82a96536f470c925cf7df385b5' 
  AND token = '7LR1zuwV4KpUIKeM9XcmMHyoaa4YdO2Vrx+ScPsZyJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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