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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae0f9067a5c1da6402f00930888bbd9df09396daa77fd63aaca3add6c798ee95' 
  AND token = 'hIpIOaO2eeKhPAM2d4BbQdKYaqbSCWSKebs13ySrHbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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