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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d22dddf26bd62cd47b3d481f106dd242c00632ae4db576c4ccbbf079ffb9164' 
  AND token = 'DdPCWQDEf0VtIT6WGjNFeak1p07EEqHPe23q0f9pTuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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