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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0fb2a8c9522ac84994531b6445096b87b69cc144a12941e4e7f1ae9ab526f23' 
  AND token = 'qGddggSLXrOmU8SNv/9BNTMk59o6OerFdJIBg1AfaCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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