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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f652d6021dd9c0b83304cc1ed4a0659f19c23cf9a6ab539b63851a81de297e81' 
  AND token = 'cbciQJi3n7qU/RyVI+hrmZHAPJfkgbtJ1iV7dmhFasc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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