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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60ca18c47df9a48bcac8baa9ee56a3b1a3805c627ff55fda52835cf3a9088b00' 
  AND token = 'Pm5+I/3fc4MxiBP7h+70goAOp8/N89i/H3i5ZbLAYW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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