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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '179f500785f3b5beaad4b908e08db13fabc28e103fa3fa8a1dc46bdd6471e98a' 
  AND token = 'QEs70zL5Onxh0nMuGU7FysP55feRh+6Hdq8H80v2ydI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00080

JSON explain

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