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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82813a39aef2267f818e671e9ff40a8526940296ffaac72611891908c659f02a' 
  AND token = '09+P3Hsh2HZTYhUebSwkoQ4mi2kX4E2u9x7lb91VQHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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