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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '161f24930c9fed41445fb72bb1d4a65a0537f2a86403062fb3dd2f9401eae0b8' 
  AND token = 'SvuNjH7qU7R5WmrieOo7QH/9q5dWW7M9142pIkMnBvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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