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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '468078ce54ac3a23b2f0e0e030ed815708a09cdeb7f7cb7811c2a8077fb99e8e' 
  AND token = 'pI75qKXmLR6bVr+YCGM6extzA/745Hb0wpmQw1+XPSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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