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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '030ad20e5b1cb8d29952315ea34fc61536189e4dab2229a415f79a264688aa0d' 
  AND token = 'XLDeYJP/1kvaGZSsTY94ZWdxFiBkLm77g3Pr9lsECzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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