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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '000d2d86cae69b5e70f73700ad85d3a73b322a334c07381cf85bd43c175fef1d' 
  AND token = 'v9B5d/RFbdxmpP+tGm0OF6L4lGwKJeFidk3fWbvczlk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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