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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd53ba6c7ec4b80e7b72f3cf601a06406500bbc765dacfdb5f33848f4a134ab19' 
  AND token = 'kWkawVy5y4fMb+xGsd+2juTskGV6X3RhoTY1W0CDtn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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