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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5ce183fea83a89372257b6405b4d329ea1a16e6e5fa184347b7d4eace7592c2b' 
  AND token = 'nKM6rm7pqr7XR8kl+euLd5qonOOeUVxpzk4DA5SeCKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00087

JSON explain

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