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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '215c2844612f2e6a3cd6d3c1cdd4fb84ae05aa26b194b4e4c77ddd600c5a0cb1' 
  AND token = 'nS/T7TQF5B+s5WWwhtTD2lQvtMQMp6A1oh+SBWeEFhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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